

Unlike many viruses, which pass easily through air, water,
food, and casual contact, HIV usually requires risky behaviors like
sex and drug use for its transmission. People do not perform these risky
behaviors in a vacuum. Instead, biological, psychological, demographic,
and sociocultural factors affect both the likelihood and the consequences
of these behaviors. This chapter discusses these behavioral, biological,
psychological, demographic, and sociocultural risk factors for getting
and giving HIV/AIDS.